I would like to see what sort of compiler optimizations are beneficial
for an ARM processor (in particular the ARM7 family). For some other
processors, like the PowerPC or Infineon TriCore, there are so-called
"Compiler Writer's Guides" that tell a compiler writer what processor
features should be taken into account to get a well optimized code.

Are there also such type of documents for the ARM7 processor?
Or do you know any other sources that deal with ARM7 compiler
optimizations?